LiftHeight Ecoli MultiferroicMaterials polymeric_arrays mfm_amplitude Ram Mechinical Force-distance KAIST PS_LDPE NTU Copolymer strontiu_titanate CeNSE_IISc Al2O3 LiBattery doped MagneticForce Conduct Polymer SrTiO3 phase_change Bacterium SKKU Polyaniline Vanadate IISCBangalore DataStorage Hole KPFM Switching AlkaneFilm PatternedSapphireSubstrat EPFL Wildtype